Quick answers
- Does Daniel J. Castro Pereira accept Medicare assignment?
- Yes. Medicare's clinician data says Daniel J. Castro Pereira accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Daniel J. Castro Pereira see?
- In 2024, CMS data shows 346 Original Medicare patients and 1,946 services for Daniel J. Castro Pereira. This counts Original Medicare only and measures volume, not quality.
- What is Daniel J. Castro Pereira's NPI number?
- 1912212390. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Daniel J. Castro Pereira, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 346 |
|---|---|
| Services billed to Medicare | 1,946 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)262 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)235 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)178 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)142 services
- Kidney function blood test panel (80069)109 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease75%
- Diabetes60%
- Ischemic heart disease48%
- Heart failure46%
Hospitals where Daniel J. Castro Pereira works
Medicare's Facility Affiliation Data lists Daniel J. Castro Pereira at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Holy Cross HospitalNogales, AZ · Critical Access Hospital · Emergency services: listed by Medicare · CCN 031313
- Northwest Medical CenterTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030085
- Oro Valley HospitalOro Valley, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030114
- St Joseph's HospitalTucson, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030011
- St. Mary's HospitalTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030010
Practice locations
Addresses where Daniel J. Castro Pereira is enrolled with Medicare (CMS data updated October 2, 2026).
- 1710 N Mastick WayNogales, AZ 85621 (520) 623‑2642
Group practices
Medicare enrollment lists Daniel J. Castro Pereira as a member of this group (CMS data updated October 2, 2026).
- Southwest Kidney Institute PLC101 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Arizona
Clinicians with the same Medicare primary specialty in Arizona — not a recommendation.
Other clinicians in Southwest Kidney Institute PLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912212390 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians